Ippei Taru

The head maid of a rich household wants to retire and choose someone else to replace her. Before she goes however, she decides to give her young master a farewell gift in the form of a hot sex session, followed by interviewing new potential maid recruits with another sex session. Can't complain.

A Horse-man, a Snake-Woman, Orcs. Shoujo Senki Brain Jacker is captured and brutally raped by each. A follow-up story to Shoujo Senki Soul Eater based on the game by the same name from Lune